“Twice in the past, Boston has arrived at the top level of international opera, with a combination of adventurous repertoire, major singers, and theatrically exciting productions. This occurred early in the 20th century at the old Boston Opera House on Huntington Avenue, and later on with the late Sarah Caldwell. But this can’t even be a goal nowadays for two basic reasons: There isn’t the money for it because of competition for funding with older and more prestigious arts organizations such as the BSO. And there isn’t a suitable venue.”